/usr/share/sssd/sssd.api.d/sssd-simple.conf is in sssd-common 1.16.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | [provider/simple]
[provider/simple/access]
simple_allow_users = str, None, false
simple_deny_users = str, None, false
simple_allow_groups = str, None, false
simple_deny_groups = str, None, false
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